Plug and socket connector.



L-SACHS.

PLUG AND SOCKET CONNECTOR. APPLICATION FILED M'AR. 1-3, 1915. RENEWED FEB. 26. 1917.

Patented Mar. 27, 1917.

[/7 VE'I? far A 2 far/75g Original application filed August 30, 1912, Serial No. 7

1915, Serial No. 14,240. Renewed February 26, 191?.

ra rnrrr ora ion,

JOSEPH SACHS, 0F HARTFORD, CONNECTICUT, ASSIGNOE, BY MESNE ASSEGNMENTS, T0 THE HART 8c HEGEMAN MANUFACTURING COMPANY, OF HARTFORD, CONNECTICUT,

A CORPORATION OF CONNECTICUT.

To all whom it may concern:

Be it known that I, Josnrii SACHS, a citizen of the United States, residing at Hartford, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in F111;; and Socket Connectors, of which the following is a specification.

This invention relates to plug and socket devices, the object of the iny'ention being to provide an article of this character which has effective means for rapidly insuring a firm, substantial contact between the metal shell of the plug and the metal shell of the socket.

In the accompanying drawing forming a part of the present specification, I have illustrated in section one of the several forms of embodiment of the invention, which will be set forth in detail in the following description. I do not restrict myself to this disclosure; I. may depart therefrom in several respects within the scope of the invention defined by the claims "following said description. The device involves in its make-up a plug member as 2 and a socket or receivin member 3.

The plug member has a body or core as 4 of some suitable material such as porcelain, bein generally of approximately cylindrical orm. This body or core 4 is surrounded by the metal shell 5 constituting a suitable contact and which as shown is externally threaded to engage internal threads in a shell carried by the socket member or receptacle 3 as will hereinafter more particularly appear. The lower or inner end of the shell 5 extends short of the corresponding end of the core 4. The upper end of said shell 5 has an inturned flange (S which as shown is integral with the shell and which finds a bearing or seat upon the l'lat top portion of the cavity 7 in the ring-8, the latter being of some suitablematerial suclnas porcelain. The flange 5 1s ])I()\l(l0(l \\'1tl1 an upwardly projecting tubular portion 9 which is disposed in the central Ol'lcillllg of thc insulating securing ring 8. Said tubular portion or extension 9 of the shell 5 is threaded upon the boss 10 of the bushing 11 which externally fits flatwise against the Specification of Letters Patent.

Patented Mar. 2'21, 1.91%

17,942. Divided and this application filed March 13, Serial No. 151,152.

ring" 8. The bushing 11 is hollow and as shown is also of insulating material, such I as molded material. The core l, the shell 5, the ring 8 and the bushing 11, therefore, constitute a unit.

Inclosed by the contact shell 5 is a wire connector 12 of metal and which in the pres ent case has both a mechanical and an electrical connection with said shell. The mechanical connection can be obtained by riveting or otherwise suitably securing the butt of the connector to the shell; the engagement between the two parts provides for the electrical connection. This connector 12 has a threaded hole to receive the screw 13, the head of which is located opposite an opening 14 in the side of the shell 5 to provide access to the screw 13 exteriorly of said shell for the connection of a wire to the connector 12 or its disconnection therefrom. The connector proper or the body thereof is situated in the external longitudinally disposed recess 15, while the inner end of the screw is located in a channel 16 opening into said recess to thus provide a double key connection between the shell 5 and the core 1 and as a consequence eli'cctually prevent relative rotation of said shell and core. One wire of an extension cable can be passed through the opening of the hollow plug 11 through the open upper side of the bddy or core i and wrapped one or more times around the screw 13 between the head thereof and the body of the connector 12. The other wire can be passed through the opening 17 of the core through the eyelet 18 in the bottom thereof and passed around the screw 19. Said screw is threaded into the metal plate 20 fitted in the recess 21 in the bottom of the core 41-, the wire bein clamped against said plate by the screw 19, the head of which for this purpose 'lorccs the washer 22 against said wire. the cup-like washer or disk 22 which acts-as a suitable central end contact for the plug member 2. The eyelet may as shown pass through an opening in and be headed over" insulating material as porcelain. Said bed i The screw 19 extends throughiii if stitutes the side wall tion of the shell 25. T

shown,

venient means for holding said shell in .contact shell onto has a chamber as 24 open in the top and intended to receivethe contact shell 25 into which is insertible the contact shell 5 of the plug member 2. Within the shell 25 is a socket or receptacle member 3, the central contact 26 and the shell 25 being as usual insulated from each other. The contact shell 25 is contractible, both it and the plug contact shell 5 being generally made of sheet metal. As represented the contact shell 25 is longitudinally slit as at 27 at one or more places to increase the resiliency thereof of said shell 25. The slits 27 as represented extend from the upper edge almost to the inturned flanged end of said shell 25,

to receive screws as 29 constituting a con- P sition. The upper end of said shell 25 is provided with an external flange 30 on a downward outward taper to thus produce an external cone surface to coiiperate with the operating cone surface 31 on the plug member. Said cone surface 31 as shown conof the cavity 7 the two cone or taper portions being practically upon the same angle. Just before the plug member 2 bottoms in the socket or receptacle member 3, the cone surface 31 will engage the cone surface of the flange 30, so that on the further rotary movement of the plug member, the cone surface 31 by acting against the cone surface of the flange 30 will constrict the shell 25 into substantial engagement with the shell 5, the maximum contact being obtained When the plug member has been fully bottomed. It will be noted that the side portion of the shell 25 24 to thus insure proper acchamber 24 is shown somewhat enlarged so as to provide for the free entrance of the confining ring 8 into said chamber 24.

he present case is one of two divisional applications of my application Serial No. 717,942, filed August 30, 1912. In the first or other of said two divisional applications, of which the present case is one, I have described and claimed a contact shell as 5 having anopening as 14 to provide readyaccess to a connector as 12. at I claim is: 1. An electrical socket ing an insulating body, a contact shell inclosed by the body, and a contact also in closed by said body, a plug provided with a member compriscontact shell insertible into said other con-- tact shell and also to cooperate with said plug having provided with a contact the contact in the body, means to contract the first the second contact shell.

he upper end of the 1,2ao,eea

2. In a plug and socket device a receiving contact shell, a plug member insertible in said receiving contact shell, and means on the receiving contact shell and the insertible plug member whereupon by the insertion of the plug into the receiving contact shell the latter is contracted upon the plug.

3. An electrical plug and socket device comprising a socket member having an interior contact shell, a plug member provided with a shell insertible in the other shell, the plug member being provided with means to engage the shell of the socket member to contract the same into engagement with the shell of the plug member.

4. An electrical socket member comprising an insulating body, a contact shell in the body, and a second contact also inclosed by the body, said shell being contractible and having an external flange at the free end thereof, provided with a cone surface combined with a plug member comprising a contact shell and a contact, the shell of the plug member being-insertible in the'other contact shell and the plug member being provided with means to engage the cone surface to contract the first mentioned contacp shell on the second mentioned contact she I.

5. An electrical plug and socket device comprising a socket having a contact shell, and a contact independent of the shell, a plug member provided with a contact shell to cooperate with the other contact shell and also provided with a contact to cooperate with said other contact, said plug member having means for contracting the first mentioned contact shell on the second contact shell bers.

6. A plug and socket device comprising a socket member having an interior internally threaded contractible contact shell fastened therein and also having a central contact mounted, therein, and a plug member having an externally threaded contact shell to engage with the threads on the other shell to connect the two members, the plug member being provided with means for contracting the shell of the socket member onto the shell of the plug member on relative movement of the two members.

7. An electrical plug and socket device comprising a socket member having an interior contact shell, a plug member provided with a shell insertible in the other shell, the plug member having an insulating portion and said insulating portion being provided with means to engage the shell of the socket member and contract the same into engagement with the shell of the plug member.

8. An electrical plug and socket device comprising a socket member and a plug member insertible into the socket member, the socket member having an insulating on relative movement of the two membody provided with a contact shell therein and the plug member having a core, and a contact shell surrounding the core and insertible into the other shell, said plug memher also having a cone portion to engage the shell in the/socket member and contract the same upon the shell of the plug member on relative motion of the two members.

9. An electrical plug and socket connecting device comprising a socket member and a .plug member insertible into the socket member, the socket member comprising an insulating body provided with an interior contact shell slit to produce tongues and provided with an external conical flange, the plug member comprising an insulating core, and a shell surrounding the same insertible into the other shell, the plug memher having an insulating portion provided with a conical surface to engage said flange and contract the shell of the socket member onto the shell of the plug member.

10. An electrical plug and socket device comprising a socket member having an interior contact shell, a plug member comprising an insulating core, a contact shell surrounding the core, a ring inclosing the shell, the shell having a tubular portion extending into the opening of the ring, and the plug having a bearing against the ring and connected with. said tubular portion, the shell I of the plug member being insertible into the and the insulatshell of the socket member, ing part of the plug member being provided with means for contracting the shell of the socket member onto the shell of the plug member. 11. An electrical plug. member comprising an insulating core, a shell surrounding the core provided at its upper end with an inturned flange furnished with an upwardly projecting tubular threaded extension, a ring around the shell, the opening of the ring receiving said extension and the ring having a cavity to receive theshell and to provide a bearing therefor, and a plug in threaded engagement with said extension and bearing against the ring, the side of the cavity being conical, combined with a socket member comprisin a contact shell to receive said other shell, the conical surface of said cavity being adapted to free portion of the contact shell of the socket member to contract the same on the shell of the plug member.

In testimony whereof I afiix my signature in presence of two witnesses.

JOSEPH SACHS.

Witnesses L. L. MARKEL,

HEATH bU'rriEnLAND.

engage the 

